document.write("<nav class=\"navbar navbar-default-fluid \">\n" +
    "    <div class=\"container\" style=\"background-color: white\">\n" +
    "        <!-- Brand and toggle get grouped for better mobile display -->\n" +
    "        <div class=\"navbar-header\">\n" +
    "            <button type=\"button\" class=\"navbar-toggle collapsed\" data-toggle=\"collapse\"\n" +
    "                    data-target=\"#bs-example-navbar-collapse-1\" aria-expanded=\"false\">\n" +
    "                <span class=\"sr-only\">Toggle navigation</span>\n" +
    "                <span class=\"icon-bar\"></span>\n" +
    "                <span class=\"icon-bar\"></span>\n" +
    "                <span class=\"icon-bar\"></span>\n" +
    "            </button>\n" +
    "            <a class=\"navbar-brand\" href=\"#\" style=\"padding: 0 0 0 0\"><img alt=\"Brand\"\n" +
    "                                                                           style=\"height: 50px;width: 120px\"\n" +
    "                                                                           src=\"img/B28792AFFF554818BEF42EA9B93C9310.jpg\"></a>\n" +
    "        </div>\n" +
    "\n" +
    "        <!-- Collect the nav links, forms, and other content for toggling -->\n" +
    "        <span class=\"collapse navbar-collapse\" id=\"bs-example-navbar-collapse-1\">\n" +
    "                <ul class=\"nav navbar-nav\">\n" +
    "                    <li class=\"dropdown\">\n" +
    "                        <a href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\" role=\"button\" aria-haspopup=\"true\"\n" +
    "                           aria-expanded=\"false\">手机 <span class=\"caret\"></span></a>\n" +
    "                        <ul class=\"dropdown-menu\" id=\"ul_1\">\n" +
    "                            <li><a href=\"onePlus9.html\"><img src=\"img/1617178901.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"cart.html\"><img src=\"img/1617178902.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617178903.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617178904.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617178905.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                        </ul>\n" +
    "\n" +
    "                    <li class=\"dropdown\">\n" +
    "                        <a href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\" role=\"button\" aria-haspopup=\"true\"\n" +
    "                           aria-expanded=\"false\">配件 <span class=\"caret\"></span></a>\n" +
    "                        <ul class=\"dropdown-menu\" id=\"ul_2\">\n" +
    "                            <li><a href=\"onePlus9.html\"><img src=\"img/1617178906.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617178907.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617178908.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617178909.jpg\" alt=\"\"\n" +
    "                                                 style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                            <li><a href=\"#\"><img src=\"img/1617.jpg\" alt=\"\" style=\"width: 100%;height: 100%\"><br><span>OnePlus 9 Pro 5G</span></a></li>\n" +
    "                        </ul>\n" +
    "                    </li>\n" +
    "                    <li><a href=\"#\">商城 <span class=\"sr-only\">(current)</span></a></li>\n" +
    "                    <li><a href=\"#\">品牌</a></li>\n" +
    "                    <li><a href=\"#\">服务</a></li>\n" +
    "                </ul>\n" +
    "                <form class=\"navbar-form navbar-left\" style=\"padding-top: 10px\">\n" +
    "                    <div class=\"form-group\">\n" +
    "                        <input type=\"text\" class=\"form-control\" placeholder=\"热门搜索：一加9pro\" style=\"width: 400px\">\n" +
    "                    </div>\n" +
    "                    <button type=\"submit\" class=\"btn btn-default\" data-toggle=\"modal\" data-target=\"#myModal\">搜索</button>\n" +
    "                </form>\n" +
    "                <ul class=\"nav navbar-nav navbar-right\">\n" +
    "                    <li><a href=\"login.html\" data-target=\"#myModal\">注册/登陆</a></li>\n" +
    "                    <li class=\"dropdown\">\n" +
    "                        <a href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\" role=\"button\" aria-haspopup=\"true\"\n" +
    "                           aria-expanded=\"false\">购物车 <span class=\"caret\"></span></a>\n" +
    "                        <ul class=\"dropdown-menu\">\n" +
    "                            <li><a href=\"cart.html\">查看我的购物车</a></li>\n" +
    "                            <li><a href=\"#\">结账</a></li>\n" +
    "                            <li><a href=\"#\">领取优惠券</a></li>\n" +
    "                            <li role=\"separator\" class=\"divider\"></li>\n" +
    "                            <li><a href=\"#\">目前总金额（￥6999）</a></li>\n" +
    "                        </ul>\n" +
    "                    </li>\n" +
    "                </ul>\n" +
    "                </span>\n" +
    "    </div><!-- /.navbar-collapse -->\n" +
    "</nav>");